The legacy video uploads page in Studio has been replaced with a new
view in the Authoring MFE. The legacy page has not been available for
some time, so it's all dead code. This PR removes it.
Please note that there's a waffle flag which enables the MFE version
of the video uploads page: `contentstore.new_studio_mfe.use_new_video_uploads_page`.
Unlike the other Studio MFE waffles, we're NOT going to remove this one now,
because the video uploads page has always been broken for sites other
than edx.org (or sites that have reverse-engineered their video pipeline) so
we'd like to keep the flag until it's either fixed for the community or
removed (https://github.com/openedx/openedx-platform/issues/37972).
This work is part of https://github.com/openedx/edx-platform/issues/36108
Co-Authored-By: Kyle McCormick <kyle@axim.org>
7c9f468d56